qvoid’s gists

qvoid / yuv_601_to_709.py

Created September 6, 2024 08:08

Coeffecients calculation of 8-bits YCbCr translation between BT.601 and BT.709.

qvoid / rgb_yuv_csc.py

Created September 5, 2024 06:12

Coeffecients calculation about translation between RGB and YCbCr

qvoid / mediascan.py

Last active September 27, 2023 01:27

parse video or JPEG file under directory using mediainfo and format result to import to Excel

	#!/usr/bin/python3
	# -- coding: UTF-8 --

	import subprocess
	import sys
	import os
	from os import listdir
	import os.path
	from os.path import isfile, join
	import time

qvoid / convert_avcc_to_annexb.c

Created September 4, 2023 06:46

Convert H.264 bistream from AVCC to ANNEXB format

	#include <stdio.h>
	#include <string.h>
	#include <stdlib.h>
	#include <stdint.h>

	#define AVCC_HEADER_OFFSET 4
	#define AVCC_NALU_LEN_UINT_SIZE_MINUS_1_MASK 0x3
	#define AVCC_HEADER_SPS_CNT_OFFSET 5
	#define SPS_CNT_MASK 0x1f
	#define START_CODE_SIZE 4

qvoid / image_magic

Last active June 3, 2021 02:59

	## resize
	```shell
	convert dragon_sm.gif -resize 64x64 resize_dragon.gif
	```

	## resize with ignoring sapect Raio
	```shell
	convert dragon_sm.gif -resize 64x64\! exact_dragon.gif
	```

qvoid / simplenotes_to_markdown_file.py

Last active March 1, 2021 01:28

	#!/usr/bin/python3
	# -- coding: UTF-8 --

	import json
	import yaml
	import datetime
	import os.path
	import os

	with open('./notes.json', 'r') as json_file:

qvoid / android_input

Created December 24, 2020 03:13

	## Reference
	[Google doc](https://developer.android.com/reference/android/view/KeyEvent)
	[stackoverflow](https://stackoverflow.com/questions/7789826/adb-shell-input-events)

	## Keycode

	```
	0 --> "KEYCODE_UNKNOWN"
	1 --> "KEYCODE_MENU"
	2 --> "KEYCODE_SOFT_RIGHT"

qvoid / upgrade_package.md

Last active September 21, 2023 10:38

sudo apt update
sudo apt list --upgradable

sudo apt-get install --only-upgrade

qvoid / launch.json

Last active October 21, 2020 07:25

	{
	// Use IntelliSense to learn about possible attributes.
	// Hover to view descriptions of existing attributes.
	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
	"version": "0.2.0",
	"configurations": [
	{
	"type": "gdb",
	"request": "attach",
	"name": "Attach to arm64 linux",

qvoid / xkeyboard

Last active September 21, 2023 10:38

Disable laptop built-in keyboard

	#!/bin/bash

	INNER_KEYBOARD_ID=$(xinput list \| grep "AT Translated Set 2 keyboard" \| cut -f 2 \| cut -d "=" -f 2)
	INNER_KEYBOARD_STATUS=$(xinput list \| grep "AT Translated Set 2 keyboard" \| cut -f 3 \| sed 's/\[//' \|awk '{print $1}')
	if [ $INNER_KEYBOARD_STATUS = "slave" ]; then
	echo "floating..."
	xinput float $INNER_KEYBOARD_ID
	elif [ $INNER_KEYBOARD_STATUS = "floating" ]; then
	echo "reattach..."
	xinput reattach $INNER_KEYBOARD_ID 3